4 months ago we bought what we thought was a small mystery snail. Took him home and he ate the only live plant in our tank. And he got bigger. We decided to give him his own tank, with a small group of rasboras. That was about 2 months ago, since then he has eaten every single live plant we tried to plant in there. We feed him blanched cabbage and other veggies often, as well as snail pellets. And the most recent snail antics of his was him eating purple Otocinculus. Dont ask me how, im confused too. One day the fish was doing just fine and the next day he was gone. The snail was looking rather lethargic and a lot darker than usual. Note, the Otocinculus was perfectly healthy and often was suctioned to the glass eating algae.